Thanks to all the wisdom and advice I've gotten from reading this forum and scouring the galleries, I just finished a Boba Fett costume for Nico, my 5 year old. Obviously, I had sacrifice a few accuracies for practical purposes, but it's loosely based on the ESB version.
My wife made the jumpsuit and the vest. I made the armor out of sintra, based on the WOF templates, and bought the helmet from Toys R Us. The jetpack was the "engine" from an old mechanics playset we had laying around from a few years back (I made the rocket and painted it.), and I bought the shoes at Target and painted them and added black piping. The girth belt was made from some craft cording I found at Hobby Lobby (it was already this color) and the leather pouches I found at the dollar store. I attached a flashlight to the gauntlet instead of the dart and used an old firewire cable as the flamethrower hoses.
Thanks so much to everyone for posting their tutorials, advice, tips and photos. If anyone has any questions, please let me know. It's the least I can do to give back.
Hopefully these aren't too large...